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 Beijing Zhonghuan environmental quality monitoring center professional third party environmental monitoring and testing agency
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Determination of formaldehyde emission from wood and wood furniture

Formaldehyde is a colorless gas with strong pungent odor. It has a negative impact on human health. Long term exposure to low-dose formaldehyde can cause chronic respiratory diseases, menstrual disorders, pregnancy syndrome, neonatal physical decline, chromosomal abnormalities, and even nasopharyngeal carcinoma. The harm of formaldehyde is that it can coagulate protein and cause cancer.

1、 Test item definition: Formaldehyde emission content of wood-based panels and their products (including furniture, floor, wall panel, kitchen cabinet, shop furniture, wood lines, fine wood workpieces, counters, interior decorative parts, wooden doors, etc.) for indoor decoration and decoration.

2、 Detection method:

The formaldehyde emission of wood-based panels was tested according to the national standard GB / t17657-1999 test method for physical and chemical properties of wood-based panels and veneered wood-based panels (GB / t17657-1999) and the formaldehyde emission in wood-based panels and their products for indoor decoration materials (GB / t17657-1999), and the main detection objects were formaldehyde emission of plywood, wood-based panels and their products of grade E1 and E2.

2、 Detection method:

Formaldehyde detection: spectrophotometry;


3、 Test standard:

Emission of formaldehyde from wood based panels and their products for interior decoration materials (GB 18580-2001)

GB / t17657-1999 test methods for physical and chemical properties of wood based panels and veneered panels

GB 18584-2001 limits of harmful substances in wood furniture

Fire door standard (GB 12955)

ASTM d5582-2000 Standard Test Method for formaldehyde content of wood products by desiccator

4、 Formaldehyde limit value:

Plate category

test method

Limit value

Scope of application

Limited mark

Plywood, decorative veneer veneer plywood, blockboard, etc

Desiccator method

1.5mg/L

It can be directly used indoors

E1

5.0mg/L

Must be finished and allowed to be used indoors

E2

Decorative wood-based panels (including impregnated paper laminated wood flooring solid wood Composite floor, bamboo floor, wood-based panel with impregnated film paper, etc.)

1.5mg/L

It can be directly used indoors

E1



5、 Applicable plate:

1. Plywood, decorative veneer veneer plywood, blockboard, etc;

2. Decorative wood-based panel (including impregnated paper laminated wood floor, solid wood composite floor, bamboo floor, impregnated plastic film paper veneered wood-based panel, etc.);

3. All kinds of plywood, wood-based panel furniture, wood products.

6、 Testing for customers:

Test object: suitable for individual residents and enterprise users, plate factory, furniture factory, floor factory, fireproof board factory and other decoration industry production enterprises.

7、 Health hazards of formaldehyde emission from boards:

1. Irritation to skin and mucous membrane. Formaldehyde is a toxic substance in the plasma, which can bind with protein. When inhaled in high concentration, it will cause severe irritation and edema of respiratory tract, eye irritation and headache.
2. Sensitization: skin direct contact with formaldehyde can cause allergic dermatitis, color spots, necrosis, inhalation of high concentration of formaldehyde can induce bronchial asthma.
3. Mutagenicity: high concentration formaldehyde is also a genotoxic substance. Experimental animals in the laboratory inhalation of high concentration, can cause nasopharyngeal tumor.

8、 Chronic effects of formaldehyde poisoning on plates

Long term exposure to low concentration of formaldehyde vapor, headache, weakness and other symptoms. It was reported that 14% - 16% of workers exposed to formaldehyde had digestive disorders, excitability, tremor and visual impairment. In the workshop with formaldehyde concentration of 0.2-0.7mg/m3, workers working for a long time have loss of appetite, weight loss, fatigue, headache, palpitation and insomnia. It has been reported that formaldehyde can also cause tactile, pain and temperature disorders (hypersensitivity is the most common, often limited to one side or some parts of the body), excessive sweating on one side of the body (often on the right side), and different skin temperatures on both sides of the body. Long term exposure to low concentration of formaldehyde workers eye and throat irritation symptoms and chest compression ratio was significantly higher than the control group, and lung function may be affected. Some workers may have dizziness, headache, fatigue, drowsiness, anorexia, weight loss, vision loss, etc., but there is no definite case report of chronic poisoning. Some studies have suggested that individuals or people exposed to formaldehyde have more nasal or nasopharyngeal tumors. IARC (1995) listed formaldehyde as a possible carcinogen (Group 2a) in humans (nasopharynx).

9、 The main harm of formaldehyde is as follows

1. When I get up in the morning every day, I feel stuffy, nauseous and even dizzy; 2. I often have a cold at home, and it is not easy to get well; 3. Although I don't smoke, I often feel uncomfortable throat, foreign body sensation, and poor breathing; 4. My children often cough, sneeze, and have low immunity; 5. My family members often have allergies and other problems, and they are mass; 6. Family members share a common disease, and after leaving the environment, symptoms have obvious changes and improvement; 7. Newlyweds are infertile for a long time without finding out the causes; 8. Pregnant women find fetal malformations under normal pregnancy; 9. Indoor plants are not easy to survive in newly moved or newly decorated houses, and leaves are easy to yellow and wither; 10. After the new move, the domestic cats, dogs and even tropical fish die inexplicably; 11. I feel sore throat and dry respiratory tract when I go to work, and I'll be OK after work; (the formaldehyde in the office exceeds the standard); 12. There are pungent and dazzling odors in newly decorated families and office buildings or newly bought furniture, and the odor does not disperse for a long time.
Beijing Central Environmental Quality Monitoring Center
Free telephone: 4008861860
Laboratory Tel: 010-56546165 010-56546168
Fax: 010-56546167
Address: Building 2, zhongfuli palace brand base, Fengtai District, Beijing

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